Khan/khan-exercises — Issue #7576: Parallel lines 2 - Coding is being shown rather than problem
Author: KhanBugz
Created: 2011-12-02 16:48:31+00:00
State: open
Labels: ie8, ie9, not-showing, win7

Reporter: spencer.dupee@gmail.com

The exercise is "Parallel Lines 2":

The two horizontal lines are parallel, and there is a third line that intersects them as shown below.

Solve for x:

SOLUTION

var eq1 = A + "x + " + B + "^\\circ";
var eq2 = C + "x + " + D + "^\\circ";

init({
range: [ [ -1, 11 ], [-1, 4] ]
});
graph.pl = new ParallelLines( 0, 0, 10, 0, 3 );
graph.pl.draw();
graph.pl.drawTransverse( ANCHOR );
graph.pl.drawAngle( KNOWN_INDEX, eq1 );
graph.pl.drawAngle( UNKNOWN_INDEX, eq2, "#FFA500" );

[parallel_lines_2.html?seed=158&problem=1 (alternate_interior_angles_2)](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_2.html?seed=158&problem=1&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/parallel_lines_2.html?seed=158&problem=1&debug&activity=undefined)

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